QUANTUM MECHANICS CROSSWORD

3. The theorem relating quantum expectation values to classical equations of motion.
4. A discrete packet of electromagnetic radiation.
6. Force-carrying particle having an integer value of spin.
8. The speed at which the envelope of a wave packet propagates.
12. Waves that maintain a constant phase relationship.
13. Ability of a quantum system to exist in multiple states simultaneously until measured.
14. A wave function whose total probability equals one.
17. Operator equal to its own conjugate transpose.
18. Mathematical symmetry describing inversion of spatial coordinates.
19. The operator representing the total energy of a quantum system.
20. Quantum escape through a classically forbidden energy barrier.

1. Grid-like mathematical arrangement used extensively in quantum mechanics.
2. The lowest possible energy state possessed by a quantum system.
5. An electron's positively charged antimatter counterpart.
7. A point where the probability amplitude of a wave function becomes zero.
9. Mathematical description of a particle's probability distribution.
10. Einstein's Nobel Prize-winning phenomenon involving electron emission by light.
11. Sudden transition of an electron between discrete energy levels.
15. Intrinsic angular momentum of a quantum particle.
16. Approximation method that treats small changes to a known Hamiltonian system.